"Life" after Griffiths EM Hi, I need a textbook on electrodynamics. I have already finished Griffiths electrodynamics, a wonderful book but it does not cover the things I need now from an EM book (i.e. research on photonics). Therefore, I need a book which covers the mathematical methods on EM problems (eg. expansion on Bessel functions, Green functions, etc) and also be strong on the conseptual concepts of EM. I am an undergraduate planning to apply next fall to grad school.